US Bridges

East Shore RD over Two Mouth Creek

Fair

Bonner County, Idaho · 19.0 N. Coolin · Structure no. 000000000037020

Built
1970
55 years old, rebuilt 2015
Condition
Fair
inspected August 2023
Type
Tee Beam
Prestressed Concrete
Length
42 ft
1 main span
Daily traffic
110
2023 count
Owner
County
County Highway Agency

About this bridge

East Shore RD over Two Mouth Creek is a prestressed concrete tee beam carrying East Shore RD over Two Mouth Creek in Bonner County, Idaho. It was built in 1970 and reconstructed in 2015, so it is 55 years old, older than the Idaho average of 45.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 110 vehicles a day, roughly 10% of them trucks, projected to reach 165 by 2042. The structure is 42 ft (12.8 m) long and 24 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

CarriesEast Shore RD
CrossesTwo Mouth Creek
Location19.0 N. Coolin
RouteCounty Highway 0
StateIdaho
Coordinates48.69339, -116.83061
Functional classRural Local

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; action required to protect exposed foundations
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating70 US tons
Inventory rating38 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length42 ft (12.8 m)
Longest span40 ft (12.3 m)
Deck width24 ft (7.3 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic110 (2023)
Projected traffic165 by 2042
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed98.8 mi (159 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was East Shore RD over Two Mouth Creek built?

It was built in 1970, making it 55 years old in 2025. It was reconstructed in 2015.

What condition is East Shore RD over Two Mouth Creek in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in August 2023.

How much traffic does East Shore RD over Two Mouth Creek carry?

About 110 vehicles per day (2023 count), of which roughly 10% are trucks.

How long is East Shore RD over Two Mouth Creek?

The structure is 42 ft (12.8 m) long with a longest span of 40 ft (12.3 m) and a deck 24 ft wide.

Who owns East Shore RD over Two Mouth Creek?

It is owned by the County Highway Agency.